How to use Frontmatter properties with multiple words as bindTargets in buttons?

[workflowsguy]

Hello,

I am trying to update the value of a frontmatter date property "last used" through a meta-bind-button.
Even though the documentation states that using properties with spaces requires JavaScript bracket notation, it still does not update the actual property, but instead creates (and updates) a new property "last".

Am I doing something wrong or is this an issue with Meta Bind (I am not a JavaScript expert)?

This is the code I am using (surrounding triple backticks of the code omitted):

meta-bind-button
label: "used"
hidden: false
id: "used"
style: default
actions:
  - type: updateMetadata
    bindTarget: ["last used"]
    evaluate: true
    value: new Date().toJSON()

Thanks!

[mProjectsCode]

try bindTarget: "[\"last used\"]"

[workflowsguy]

Excellent, thank you!